Air Nauru - The Polynesian island's airline flies to the neighboring Micronesian islands and Australia. It mostly has a low rating because it's not accredited by the International Air Transport Association.

Southwest Airlines - Southwest Airlines is the biggest American airline for domestic flights. However, they had a fatal accident in 2018, numerous non-fatal accidents since 2011, and a host of controversies.

Fastjet - Fastjet operates in Tanzania, Zimbabwe, and Mozambique, but has South African and British ownership. At the time of writing, the company is on the brink of collapse due to financial trouble, and doesn't have international accreditation.

Aerocaribbean - Though the brand still exists, Aerocaribbean is now fully under the control of the Cuban government's Cubana airline. In 1992 and 2010, the airline had two separate accidents where everyone aboard perished.

Somon Air - Tajikistan's first private airline, Somon Air flies to Russia, China, Uzbekistan, Turkey, Germany, the UAE and Kazakhstan. The airline has zero stars from the International Air Transport Association.

Air Panama - Air Panama was founded in 1980 and mostly operates domestic flights, with additional destinations in Costa Rica and Colombia. The airline experienced four major accidents between 1997 and 2007, with ten people losing their lives in the first accident.

AirAsia India - AirAsia was the first foreign company to set up an airline in India, launching in 2014 and now flying to 20 destinations. Financial troubles have put the airline's very existence into question and the company has a poor international rating.

NOK Air - Known for their bewildering yet fascinatingly painted planes, NOK Air has more domestic destinations in Thailand than any other carrier. Numerous flight cancellations and protests from pilots rocked the company in 2016, when the pilots were found to not meet international standards.

This Suriname airline is known for its violations of safety standards and incomplete investigations of its own plane crashes. The airline has experienced three fatal crashes since 2008, the worst one saw 19 people lose their lives.

Ariana Afghan Airlines - Ariana Afghan Airlines, famously run by Osama Bin-Laden for a period of time, had 14 accidents between 1955 and 2014. The worst of these accidents killed 45 people in 1998, when a plane crashed into a mountain range on its way to Kabul.

Turkmenistan Airlines - Turkmenistan Airlines is the only airline of Turkmenistan. It has low customer satisfaction, and the European Aviation Safety Agency has recently suspended them from EU operations until they verify that they meet all safety standards.

Kam Air was the first private airline in Afghanistan, and has seen three accidents since 2005. The worst accident was in 2005, when 104 people perished after their plane crashed into mountainous terrain near Kabul.

Iraqi Airways - The national carrier of Iraq, Iraqi Airways has seen 12 accidents since 1955. The worst of those accidents was in 1986, when hijackers attempted to seize the plane over Saudi Arabia and crashed it instead, killing 63 people out of the 106 on board.

AirAsia Thailand - Not to be confused with AirAsia X Thailand, AirAsia Thailand is essentially unrecognized by international regulators. The average passenger rating for AirAsia Thailand is 4.4/10. That said, they haven't had any fatalities in the past 10 years.

Nepal Airlines - Flying in the Himalayas is hard, and Nepal Airlines has experienced 15 accidents since 1960. The worst accident was in 1969, when all 35 passengers and crew perished in the fog. As recently as 2014 though, 18 people were lost entirely on a Nepal Airlines flight, never to be heard from again.

Himalaya Airlines - Founded in 2014, Himalaya Airlines is an airline out of Nepal. In spite of its relatively recent founding, there have been numerous safety preoccupations. It's banned within the EU.

Buddha Air - Buddha Air is the least safe airline in the world, according to AirlineRatings.com. The airline experienced a crash in 2011, killing 19 people. Like every other airline from Nepal, Buddha Air is banned within the EU.